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Section 8-3

Section 8-3. Radioactive Dating. Intro To Matter. Elements – the simplest form of matter (i.e. Hydrogen (H) or Oxygen (O) Atoms – the smallest particle of an element Compounds – two or more elements bonded together (i.e. H 2 O) Molecules – the smallest unit of a compound

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Section 8-3

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  1. Section 8-3 Radioactive Dating

  2. Intro To Matter • Elements – the simplest form of matter (i.e. Hydrogen (H) or Oxygen (O) • Atoms – the smallest particle of an element • Compounds – two or more elements bonded together (i.e. H2O) • Molecules – the smallest unit of a compound • The Periodic Table Example

  3. Radioactive Decay • When atoms of an element break down (decay) to form another element • Half-life • The amount of time it takes for half of the radioactive element to decay • Used to determine the absolute age (age in years) of rocks

  4. Determining Absolute Age • Potassium-Argon Dating • Used to date rocks because the half-life is 1.3 billion years • Example: • Carbon-14 Dating • Used to date the fossils of living things because it’s half-life is 5,730 years • Example:

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